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THE INVESTIGATION

THE INVESTIGATION

Al Capone was immediately suspected of orchestrating the Massacre, although he was living in Florida at the time. Various suspects were arrested, including Capone associate Jack McGurn, but authorities couldn’t make the charge stick.

Al Capone was immediately suspected of orchestrating the Massacre, although he was conspicuously living in Miami Beach, Florida, at the time.

Sketch of Massacre on Building
A sketch shows where the Massacre took place within the garage. Courtesy of John Binder Collection

Suspects were identified and a few individuals were arrested — including Capone bodyguard “Machine Gun” Jack McGurn — but authorities could not build a good case against anyone and no prosecutions occurred.

Jack McGurn with Girlfriend
Jack McGurn was a suspect in the Massacre but he had a “blonde alibi”: girlfriend Louise Rolfe. Courtesy of John Binder Collection

A leading account has McGurn setting up the Massacre by tricking the Moran gang members into showing up at the Clark Street garage to take a delivery of Canadian whiskey hijacked from Capone. But others, including Moran himself, disputed this storyline.

The police charged McGurn in the Massacre but he provided an alibi. He said he was in a hotel with his girlfriend, Louise Rolfe, the entire day. Then he married Rolfe, which allowed her to avoid having to testify against him. The press dubbed Rolfe the “Blonde Alibi.”

The Evidence

The Cook County coroner took a more scientific approach to investigating the Massacre. He brought in Dr. Calvin Goddard, a pioneer in the new field of ballistics testing...

The Evidence - The St. Valentine’s Day Massacre. Feb. 14th, 1929.
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